Stripper wheel



Nov. 20, 1923.

' J. DUVALL STRIPPER WHEEL Filed April 27 Patented Nov. 20, 1923.

JAMES DUVALL, or cams, wssn'me'ron.

SVTRIPPER WHEEL.

Application filed April 27, 1922. Serial No. 558,874.

7 '0 all whom it may concern:

Be it known that I, JAMES DUVALL, a citizen of the United States, and a resident of Games, county of Clark, and State of Washington, have invented a certain new and useful Improvement in Stripper Wheels, of which the following is a specification.

One of the main objects of my invention is to provide simple and efficient means for expedlting the delivery of stock from a rotary cylinder printing press.

A further object is to provide a stripper wheel which is especially adaptable to handle paper bags and other relatively stifi' paper. This stripper wheel positions the stock on a conveyor belt without crumpling and also lessens the danger of smearing thefresh ink.

A further object is to provide a stripping means for removing the stock from the press shown and described in Patent No. 1,207,149, issued Dec. 5, 1916, to myself, entitled Pneumatic press feeding means.

These and other objects are attained in mechanism comprising a toothed wheel or wheels located opposite the rotary cylinder but spaced therefrom, and driven in the opposite direction, the teeth of said wheels being under cut so. as to provide a recess at each tooth root and a portion overhanging such recess thereby adapting said overhanging tooth portion to strike the stock and cause itto slip into said recess, in so doing firmly holding the stock and pulling it away from said cylinder and throwing it at a tangent downward therefrom. These objects are shown inthe accompanying drawings, in which:

Fig. 1 is a diagrammatic representation of a rotar printing press and shows my stripper w eel positioned adjacent the type or plate cylinder;

Fig. 2 is an end elevation of Fig. 1 and shows my stripper wheel positioned opposite the longitudinal middle 'of said type or plate cylinder;

Fig. 3. is a diagrammatic representation of the train of gears used to drive the stripper wheel; and

Fig. 4 is a diagrammatic representation of the stripper wheel and shows how the teeth pull the paper away from the rotary cylinder.

The construction and operation of my device is as follows:

The press on which I have shown my stripper wheel consists of a frame a, a.

stock holding rack b, feeding cylinder 0 and pinch roll d. The stock is fed from the rack b and pulled downward between the feeding roll 0 and pinch roll d and forced between the type or plate roll 0 and the impression roll f. The type or plate roll is of course covered with ink and the paper stock will adhere to it if too much ink is applied. Thus, the stripper wheels 9 are designed to prevent the stock h from being carried upward with the ink covered roll. The stripper causes the stock It to be deflected downward on a tangent from the type or plate roll to the conveyor belt 71 mounted on the pulleys j and is, mounted on the shafts and respectively.

The impression roll is driven by the gear f mounted on a shaft 7", the type or plate roll e by the gear 6' mounted on shaft e and the intermediate gear Z-mount ed on the shaft Z, meshes withthe gear 6 which also meshes and drives the stripper wheel gear g mounted on the shaft g The stripper wheel gear being mounted on the opposite side is driven in the opposite direction to the one in which e revolves. The stripper wheels 7 are made with saw like teethm under which the recessed portion at is provided. Stock h moving directly forward strikes this recess and is deflected downward and away from the type or plate roll. The lip m prevents the stock from passing over the top of thestripper wheel.

I claim:

1. .In combination with a printing presshaving a rotary cylinder, of means for stripping the printed article from the latter consisting off one or more'toothed wheels located adjacent said cylinder and driven in V the same direction, the teeth of said wheel being of ratchet type inclined in the direction of rotation of the{ wheel, whereby the end of the article is pulled from said cylinder and thrown at a tangent downward therefrom.

stripping the printed article from the latter, consisting of one or more toothed g arness wheels located adiacent and spaced from 4:, In combination with a printing press said cylinder and driven in the same direchaving a rotary cylinder, of means for tion, whereby the end of the article is pulled stripping the printed article from the latfrom said cylinder and thrown at a tangent ter, consisting of one or more toothed 20 a downward therefrom. wheels located adjacent said cylinder'and 3. In combination with a printing press driven in the same direction, the teeth of having a rotary cylinder, of" means for said wheel being under cut so as to prostripping the printed article from the latvide a recess'at each tooth root, and a porter, consistin of one or more toothed tion overhanging such recess, thereby adapt- 25 10 wheels locate adjacent and spaced from ingsaid, overhanging tooth-portion to said cylinder and driven in the same direcstrike the article and cause it to slip into tion, the teeth of said wheel being of ratchet the said recess, in so doing firmly holding type inclined in the direction of rothe end of the article so seized, pulling it tationof the wheel, whereb the end-of away from said cylinder, and throwing it so to the article is pulled from said cylinder and at a tangent downward therefrom.

thrown at a tangent downward therefrom. JAMES DUVALL. 

